/**
 * Copyright 2010 Butin Kirill <kiryaka@gmail.com>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.flexupload.controller;

import java.io.File;
import java.io.IOException;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;

import org.flexupload.model.FileInfo;
import org.flexupload.model.FilePart;
import org.flexupload.utils.FileUtils;

@Component("uploadController")
public class UploadControllerImpl implements UploadController {
	private static Logger log = Logger.getLogger(UploadController.class);
	private static String TEMP_DIR = System.getProperty("java.io.tmpdir");

	public FileInfo createTempFile(FileInfo fileInfo) throws IOException {
		File file = File.createTempFile("kiryaka_upload_", ".tmp");
		FileUtils.createFileWithGivenLength(file, fileInfo.getSize());
		fileInfo.setTempFileName(file.getName());
		return fileInfo;
	}

	public void delete(FileInfo fileInfo) {
		File f = new File(getFileInfoTempPath(fileInfo));
		f.delete();
	}

	public FileInfo saveFilePart(FileInfo fileInfo, FilePart filePart) throws IOException {
		FileUtils.writeToFileFromOffset(getFileInfoTempPath(fileInfo), 
											filePart.getFileOffset(), 
											filePart.getByteArray());
		return fileInfo;
	}

	public void moveFileFromTempTo(FileInfo fileInfo, String newDestinationPath) throws IOException {
		FileUtils.moveFile(getFileInfoTempPath(fileInfo), newDestinationPath, fileInfo.getName());
		delete(fileInfo);
	}

	public String getFileInfoTempPath(FileInfo fileInfo) {
		return TEMP_DIR + "/" + fileInfo.getTempFileName();
	}
}
